Treatment machine for a flexible material web, in particular a plastics film, which can be passed through a treatment furnace

Abstract

A treatment machine for flexible material webs which can be passed through treatment furnaces is disclosed having at least two successive zones in an extraction direction (A) of the material web, a zone separation device in relation to the extraction direction (A) of the flexible material web. The zone separating device includes at least one air partitioning device (AC) having an injection device (AC-E) which extends transversely to the material web and is designed such that a gaseous fluid flow (S) extending up to the flexible material web is generated above it. The injection device (AC-E) is also designed such that the gaseous fluid flow exiting from the injection device (AC-E) impinges obliquely in the direction of the flexible material web and thus on the material web plane (E) formed by the material web at a blowing angle (α).

The invention claimed is: 
     
       1. A treatment machine for flexible material webs which can be passed through treatment furnaces, comprising:
 the treatment machine comprises at least two successive zones in an extraction direction of the material web, having a zone separation device, 
 in relation to the extraction direction (A) of the flexible material web, the zone separation device comprises at least one air partitioning device (AC) having an injection device (AC-E) which extends transversely to the material web and is designed such that a gaseous fluid flow (S) extending up to the flexible material web is generated above it, 
 wherein the injection device (AC-E) is also designed such that the gaseous fluid flow from the injection device (AC-E) impinges in transverse direction obliquely onto the flexible material web and thus on the material web plane (E) formed by the material web at a blowing angle (α) formed with respect to the flexible material web or with a blowing angle component (α) formed with respect to the flexible material web of less than 80°, wherein the blowing angle (α) or the blowing angle component (α) lies in an angular plane (WE) running perpendicularly to the extraction direction (A) and thus perpendicularly to the flexible material web. 
 
     
     
       2. The treatment machine according to  claim 1 , wherein the injection device (AC-E) has nozzle openings which are aligned in the direction of the material web and arranged in at least one row (R 1 , R 2 ) extending transversely or perpendicularly across the material web. 
     
     
       3. The treatment machine according to  claim 1 , wherein a fluid flow exits from the injection device (AC-E), which fluid flow is aligned partly at a blowing angle (α) or blowing angle component (α) running obliquely on one side of the material web and partly at a blowing angle (β) or blowing angle component (β) running obliquely in the opposite direction on the opposite side of the material web. 
     
     
       4. The treatment machine according to  claim 1 , wherein the injection device (AC-E) has nozzle openings which are aligned in the direction of the material web and arranged in at least two rows (R 1 , R 2 ) extending transversely or perpendicularly onto the material web, wherein the fluid flow exiting from the nozzle openings of one row (R 1 ) along the flow arrows ( 33 ) impinges on the material web at an oblique angle (α) or blowing angle component (α), and in that the fluid flow exiting from the nozzle openings of the at least one further row (R 2 ) along the flow arrows impinges on the material web at an oblique angle (β) or blowing angle component (β) inclined opposite thereto. 
     
     
       5. The treatment machine according to  claim 1 , wherein the injection device (AC-E) is designed such that the fluid flow exiting therefrom is inclined at a blowing angle (α, β, γ) in relation to the material web plane (E) and thus in relation to the material web such that
 a) the blowing angle (α; γ) lies only in the angular plane (WE) aligned perpendicularly to the extraction direction (A) and thus to the material web plane (E) and its blowing angle component in the extraction direction (A) or opposite to the extraction direction (A) is 90°, or 
 b) the blowing angle (α; γ) additionally has a blowing angle component (γ) in the extraction direction (A) or opposite to the extraction direction (A), which component has a value less than or equal to 85° with respect to the material web plane (E). 
 
     
     
       6. The treatment machine according to  claim 1 , wherein a suction device (AC-A) is provided adjacent to the injection device (AC-E), which suction device is arranged parallel and/or with respect to the material web plane (E) such that its suction openings are further away from the material web plane (E) than the nozzle openings in the injection device (AC-E), and in that the suction device (AC-A) is upstream or down-stream of the injection device (AC-E) in the extraction direction (A) of the material web. 
     
     
       7. The treatment machine according to  claim 1 , wherein the fluid flow exiting via the injection device (AC-E) has an injection temperature which corresponds to or deviates from the temperature in a subsequent treatment zone in the extraction direction (A) or the treatment zone in which the injection device (AC-E) is positioned by less than 20° C. or by less than 15°, 10°, 5°, 2° or by less than 1° C. 
     
     
       8. The treatment machine according to  claim 1 , wherein the blowing angle (α, β) lying in the angular plane (WE) or the blowing angle component (α, β) lying in the angular plane (WE) is
 a) less than 75°, 70°, 65°, 60°, 55° or less than 45° and/or 
 b) greater than 30°, 35°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°. 
 
     
     
       9. The treatment machine according to  claim 1 , wherein the blowing angle component (γ) lying in a longitudinal plane (LE) perpendicularly to the angular plane (WE) and thus parallel to the ex-traction direction (A) is
 a) less than 85°, 75°, 70°, 65°, 60°, 55° or less than 45° and/or 
 b) greater than 30°, 35°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°. 
 
     
     
       10. The treatment machine according to  claim 1 , wherein the injection device (AC-E) has or comprises nozzle openings which consist of round, circular, square, oval, rectangular and/or n-polygonal openings or a combination of the aforementioned openings. 
     
     
       11. The treatment machine according to  claim 1 , wherein the fluid flow emerging from the injection device (AC-E) and impinging on the material web plane (E) at an oblique blowing angle (α; β; γ) is generated by nozzle openings which are formed
 a) by bores or channels running obliquely in an out-let wall of the injection device (AC-E) and/or 
 b) by corresponding flow guide devices generating an oblique fluid flow. 
 
     
     
       12. The treatment machine according to  claim 1 , wherein the injection device (AC-E) is designed such that a fluid flow is discharged thereby in the direction of the material web at an exhaust speed
 a) that corresponds at least to an extraction speed of the material web in the extraction direction (A) or at least to 2, 3, 4, 5, 6, 7, 8 or at least 9 times the extraction speed of the material web, and/or 
 b) that corresponds at most to 10 times the extraction speed of the material web in extraction direction (A) or at most to 9, 8, 7, 6, 5, 4, 3 or at least 2 times the extraction speed of the material web. 
 
     
     
       13. The treatment machine according to  claim 1 , wherein:
 between the at least two successive zones, the zone separation device for separating the successive zones comprises a zone partition wall running transversely or perpendicularly to the extraction direction (A) of the flexible material web, 
 a passage gap is provided in the zone partition wall, through which gap the flexible material web can be moved in a contact-free manner in the extraction direction (A), 
 in relation to the extraction direction (A) of the flexible material web, the air partitioning device (AC) with the blowing device (AC-E) extending transversely to the material web is upstream and/or downstream of the zone partition wall immediately adjacent thereto. 
 
     
     
       14. The treatment machine according to  claim 1 , wherein the air partitioning device (AC) is arranged within a zone away from or not adjacent to a zone partition wall on the inlet and/or outlet side.